Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"khanh van chi snippets" » "khanh van code snippets", "thanh van chi snippets", "khanh vinh chi snippets", "hanh va chi snippets", "khanh van chien snippets", "khanh luan chi snippets", "khanh van chat snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("khanh van chi snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khanh van chi snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( khanh van chi snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh van chi snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.